^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009,2010 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mfd/wm831x/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mfd/wm831x/pdata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static int wm831x_i2c_probe(struct i2c_client *i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) const struct of_device_id *of_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct wm831x *wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) enum wm831x_parent type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (i2c->dev.of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) of_id = of_match_device(wm831x_of_match, &i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (!of_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) dev_err(&i2c->dev, "Failed to match device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) type = (enum wm831x_parent)of_id->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) type = (enum wm831x_parent)id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (wm831x == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) i2c_set_clientdata(i2c, wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) wm831x->dev = &i2c->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) wm831x->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (IS_ERR(wm831x->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ret = PTR_ERR(wm831x->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return wm831x_device_init(wm831x, i2c->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int wm831x_i2c_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return wm831x_device_suspend(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static int wm831x_i2c_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) wm831x_device_shutdown(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static const struct i2c_device_id wm831x_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) { "wm8310", WM8310 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) { "wm8311", WM8311 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) { "wm8312", WM8312 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) { "wm8320", WM8320 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) { "wm8321", WM8321 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) { "wm8325", WM8325 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) { "wm8326", WM8326 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static const struct dev_pm_ops wm831x_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .suspend = wm831x_i2c_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .poweroff = wm831x_i2c_poweroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static struct i2c_driver wm831x_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .name = "wm831x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .pm = &wm831x_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .of_match_table = of_match_ptr(wm831x_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .suppress_bind_attrs = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .probe = wm831x_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .id_table = wm831x_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int __init wm831x_i2c_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = i2c_add_driver(&wm831x_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) pr_err("Failed to register wm831x I2C driver: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) subsys_initcall(wm831x_i2c_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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